That's a rather sweeping statement given that no estimates of the contribution to measurement noise due to the finite number of samples has been made.

The official estimate of the damage has now doubled to $4bn and it looks like it will take more like years to put everything right here. Certainly the building codes here have saved peoples lives but the fact that we reside on a gravel bed has still rendered a lot of building damage, even to new properties, due to the liquefaction and uneven subsidence.

> If you average over many samples, all of these will get you a better > estimate. How much better depends on a bunch of things. The TI part *could* > do very well if you have a 200 MHz signal to look at. > For time-correlated single photon counting (our primary use for precision timing), having high temporal resolution is quite important.

A sine modulation of frequency and the way we can estimate it's impact on future time is quite different from that of inherent noise sources. Also, it doesn't scale to the white frequency noise. Similarly, other systematic effects should be separated out of the data before noise analysis. > Does this make sense?

The underlying point is that you need to estimate the systematic and random effects separately, and then fit them together with their quite drastic different probability behaviors. You can't use either of the tools as the single tool, unless you have a fairly good idea of the dominant part, which I can't in this case. I discussed this point with Dr.

forward converter [not fly -back] look for pot-cores material 3C80, 3C81, 3C85 or equivalent, you will need a cca 21 to 28mm dia pot-core if you run it at 80 to 120kHz, driver ic TL495 , which is a PWM push pull controller estimate the efficiency for 60% for the input power, look for very good and large 10Megohm resistors you wil nee four of them 3700V/01mA

I’d be quite happy with a 1-2 AH setup that gives me 2 to 4 hours (or half that if my power estimates are bunk). The 7AH’s are already dirt cheap. They make a ton of them. I’d save some money, but not a lot. The main thing I’d save would be space.

Hi After some more digging, I was more than a bit high on my kit cost estimate. The MV89’s are $5-$6 on the market in China. The PCBs as a set are under $3. Best guess is that the kit (if that’s what it is) sells for under $25 un-assembled.

>I also disagree with your estimate of the CR5 zener current. [...] >[...] >the CR5 diode current must be (12.2195 - 4.2456 mA) = 7.9739 mA. Good point. >That's >pretty close to the zero temperature coefficient current for the 1N938 >you describe. So I do not recommend changing the diode current.

Basically, the sampled signals are run through a sine fit routine, which gives very good estimation of sine amplitude and phase shift (With frequency being set by the signal generator). Using this setup, the first try involved making a voltage divider with a fixed resistor and the crystal.